From x-ray crystallography to electron microscopy and back -- how best to exploit the continuum of structure-determination methods now available
|
|
- Ursula Barton
- 5 years ago
- Views:
Transcription
1 From x-ray crystallography to electron microscopy and back -- how best to exploit the continuum of structure-determination methods now available Scripps EM course, November 14, 2007
2 What aspects of contemporary x-ray crystallography have made it a particularly powerful tool in structural biology? Molecular replacement: the body of pre-existing structural knowledge simplifies a new structure determination Density modification: elimination of noise by imposition of reality criteria in direct space Refinement: constraints enable you to incorporate chemical reality criteria
3 1. Phasing x-ray data from EM (TBSV; reovirus core) 2. Phasing electron diffraction data from coordinates derived from x-ray crystallography (aquaporin) 3. Docking an x-ray structure into an EM map (clathrin coat) 4. Lessons from x-ray crystallography for single-particle EM
4 X-ray crystallographic structure determination 1. Experimental phases map (modified map) build model Experimental phases are poor; density modification is useful whenever possible. Building rarely produces complete or fully correct model: model refine rephase rebuild and extend model refine (cycle) 2. MR phases map and MR model rebuild or extend model refine (cycle) Map is strongly biased, so it is much better to modify map based on solvent flattening or ncs, then continue with rebuilding and extending
5 Examples: phases from EM map as MR model, density modification from non-crystallographic symmetry (icosahedral: 5-fold in these two cases) TBSV: negative stain, 30 Å (1974) Reovirus: cryo, 30 Å (2000)
6
7 Protease σ3 σ1 μ1 σ3 μ1 σ1 σ2 λ1 λ2 Virion ISVP infectious or intermediate subviral particle Core Dryden, Baker et al. (1993).
8 Crystals of reovirus cores F432, a= 1255 Å Initial phases to 30 Å from modified EM density Phase extension by averaging
9 Averaging as basis for phase extension in x-ray crystallography Map Mask, average, and reconstitute SFs F s and ϕ s Works because true a.u. is smaller than crystallographic a.u., transform is effectively oversampled
10 Non-cryst. symmetry averaging and solvent flattening F,ϕ c F,ϕ FFT map F c,ϕ c dens. mod. FFT map'
11
12 Aquaporin-0 (AQP0): Molecular replacement with MOLREP, monomer as model Must refine unit cell (grid search) Refinement with CNS 1. Rigid body with unit-cell variation 2. Simulated annealing; rebuild from 2Fo-Fc with solvent flipping maps and SA omit maps to correct Gonen et al, 2004
13 Aquaporin-0 (AQP0): Gonen et al, 2005
14 Docking a model from x-ray crystallography (or NMR) into a cryoem density Two key resolution barriers: ~ 8-9 Å and ~ 4 Å Rigid-body refinement vs. more flexible refinement
15 Transferrin/TfReceptor Cheng et al (2004) Cell 116:
16 Molecular replacement: 1. Can a molecular model work as an initial reference for single-particle alignment, with appropriate filtering of spatial frequencies? 2. How can we best exploit molecular replacement in 2-D crystallography?
17 Clathrin coat 1. Density modification 2. ncs symmetry averaging Fotin et al, 2004
18 assembly Assembly - disassembly and of clathrin disassembly coats of clathrin coats uncoating cargo receptor vesicle formation adaptor clathrin
19 Anatomy of a clathrin coat C C proximal N knee distal ankle linker Clathrin lattice terminal domain N Triskelion = 3 x (Heavy Chain + Light Chain)
20 QuickTime and a Cinepak decompressor are needed to see this picture.
21 D6 barrel Musacchio slide here Musacchio, Smith, Grigorieff, Pearse, Kirchhausen
22 X-ray structure of clathrin fragments Proximal Region N-terminal Domain Ybe et al, 1999 terhaar et al, 1998
23 Comparison of EM and X-ray densities at 7.9 Å Top View Side View EM X-ray
24 Clathrin CHCR domain organization Proximal Region N-terminal Domain CHCR7 CHCR6 CHCR5 CHCR4 CHCR3 CHCR2 CHCR1 CHCR0 N-terminal Domain
25 Modeling structure of the whole leg CHCR7 CHCR6 CHCR5 CHCR4 CHCR3 CHCR2 CHCR1 CHCR0 N-terminal Domain
26 The helical tripod H CHCR7 CHCR6 CHCR5 CHCR4 CHCR3 CHCR2 CHCR1 CHCR0 N-terminal Domain
27 Two questions: 1. Can we improve a reconstruction by use of a model built into the density as reference? 2. Can we refine a model against the observed data (projected images)?
28 In crystallography, measured amplitudes are, by experimental arrangement, coming from an averaged structure. In single-particle EM, measured projections contain unique noise that will disturb estimate of projection parameters
29 X-ray: observations are amplitudes; refine model parameters against these observations, using chemistry as a constraint. If the model is incomplete, use refinement to improve phases, get better map, extend model. refine F.T. build Model Model Suitable map Model Refinement minimizes: F i calc (h;x) - F i obs (h) 2 R = F i obs (h) 2
30 EM: observations are projections; what parameters should be refined? Do we have enough power to refine against the following agreement factor? σ i calc (u,v;x,θ i ) - σ i obs (u,v) 2 R = σ i obs (u,v) 2 where σ i calc is the calculated projection, as a function of x, the model coordinates (and B s), and of θ i, the orientation and origin of the i th projection If not, what is a suitable compromise?
31 Would hope to have the following cycle: refine reconst build Model Model Suitable map Model
32 Karin Reinisch Tamir Gonen Yifan Cheng Piotr Sliz Alex Fotin Tom Walz Niko Grigorieff Tom Kirchhausen David DeRosier
33 X-ray: observations are amplitudes; refine model parameters against these observations, using chemistry as a constraint. If the model is incomplete, use refinement to improve phases, get better map, extend model. refine F.T. build Model Model Suitable map Model Refinement minimizes: F i calc (h;x) - F i obs (h) 2 R = F i obs (h) 2
Direct Method. Very few protein diffraction data meet the 2nd condition
Direct Method Two conditions: -atoms in the structure are equal-weighted -resolution of data are higher than the distance between the atoms in the structure Very few protein diffraction data meet the 2nd
More informationCrystal lattice Real Space. Reflections Reciprocal Space. I. Solving Phases II. Model Building for CHEM 645. Purified Protein. Build model.
I. Solving Phases II. Model Building for CHEM 645 Purified Protein Solve Phase Build model and refine Crystal lattice Real Space Reflections Reciprocal Space ρ (x, y, z) pronounced rho F hkl 2 I F (h,
More informationConformationally Variable Single Particles Heterogeneity in the real world
Conformationally Variable Single Particles Heterogeneity in the real world Stan Burgess University of Leeds, UK Workshop on Advanced Topics in EM Structure Determination: Challenging Molecules November
More informationMacromolecular X-ray Crystallography
Protein Structural Models for CHEM 641 Fall 07 Brian Bahnson Department of Chemistry & Biochemistry University of Delaware Macromolecular X-ray Crystallography Purified Protein X-ray Diffraction Data collection
More informationMolecular electron microscopy
Molecular electron microscopy - Imaging macromolecular assemblies Yifan Cheng Department of Biochemistry & Biophysics office: GH-S427B; email: ycheng@ucsf.edu 2/22/2013 - Introduction of Molecular Microscopy:
More informationMolecular Replacement (Alexei Vagin s lecture)
Molecular Replacement (Alexei Vagin s lecture) Contents What is Molecular Replacement Functions in Molecular Replacement Weighting scheme Information from data and model Some special techniques of Molecular
More informationElectron Density at various resolutions, and fitting a model as accurately as possible.
Section 9, Electron Density Maps 900 Electron Density at various resolutions, and fitting a model as accurately as possible. ρ xyz = (Vol) -1 h k l m hkl F hkl e iφ hkl e-i2π( hx + ky + lz ) Amplitude
More informationHistory of 3D Electron Microscopy and Helical Reconstruction
T H E U N I V E R S I T Y of T E X A S S C H O O L O F H E A L T H I N F O R M A T I O N S C I E N C E S A T H O U S T O N History of 3D Electron Microscopy and Helical Reconstruction For students of HI
More informationStructural Studies of the Flexible Filamentous Plant Viruses
Structural Studies of the Flexible Filamentous Plant Viruses Caitlin Azzo Dr. Gerald Stubbs BSCI 296 [4] Honors Thesis April 23, 2014 The Plant Viruses of Interest In the Potyviridae family: Wheat streak
More informationScattering Lecture. February 24, 2014
Scattering Lecture February 24, 2014 Structure Determination by Scattering Waves of radiation scattered by different objects interfere to give rise to an observable pattern! The wavelength needs to close
More informationThree-dimensional structure of a viral genome-delivery portal vertex
Three-dimensional structure of a viral genome-delivery portal vertex Adam S. Olia 1, Peter E. Prevelige Jr. 2, John E. Johnson 3 and Gino Cingolani 4 1 Department of Biological Sciences, Purdue University,
More informationProtein Crystallography
Protein Crystallography Part II Tim Grüne Dept. of Structural Chemistry Prof. G. Sheldrick University of Göttingen http://shelx.uni-ac.gwdg.de tg@shelx.uni-ac.gwdg.de Overview The Reciprocal Lattice The
More informationX-ray Crystallography. Kalyan Das
X-ray Crystallography Kalyan Das Electromagnetic Spectrum NMR 10 um - 10 mm 700 to 10 4 nm 400 to 700 nm 10 to 400 nm 10-1 to 10 nm 10-4 to 10-1 nm X-ray radiation was discovered by Roentgen in 1895. X-rays
More informationsin" =1.22 # D "l =1.22 f# D I: In introduction to molecular electron microscopy - Imaging macromolecular assemblies
I: In introduction to molecular electron microscopy - Imaging macromolecular assemblies Yifan Cheng Department of Biochemistry & Biophysics office: GH-S472D; email: ycheng@ucsf.edu 2/20/2015 - Introduction
More informationCrystals, X-rays and Proteins
Crystals, X-rays and Proteins Comprehensive Protein Crystallography Dennis Sherwood MA (Hons), MPhil, PhD Jon Cooper BA (Hons), PhD OXFORD UNIVERSITY PRESS Contents List of symbols xiv PART I FUNDAMENTALS
More informationX-ray Crystallography
2009/11/25 [ 1 ] X-ray Crystallography Andrew Torda, wintersemester 2009 / 2010 X-ray numerically most important more than 4/5 structures Goal a set of x, y, z coordinates different properties to NMR History
More informationSHELXC/D/E. Andrea Thorn
SHELXC/D/E Andrea Thorn What is experimental phasing? Experimental phasing is what you do if MR doesn t work. What is experimental phasing? Experimental phasing methods depend on intensity differences.
More informationOverview - Macromolecular Crystallography
Overview - Macromolecular Crystallography 1. Overexpression and crystallization 2. Crystal characterization and data collection 3. The diffraction experiment 4. Phase problem 1. MIR (Multiple Isomorphous
More informationParM filament images were extracted and from the electron micrographs and
Supplemental methods Outline of the EM reconstruction: ParM filament images were extracted and from the electron micrographs and straightened. The digitized images were corrected for the phase of the Contrast
More informationImage definition evaluation functions for X-ray crystallography: A new perspective on the phase. problem. Hui LI*, Meng HE* and Ze ZHANG
Image definition evaluation functions for X-ray crystallography: A new perspective on the phase problem Hui LI*, Meng HE* and Ze ZHANG Beijing University of Technology, Beijing 100124, People s Republic
More informationThree-Dimensional Electron Microscopy of Macromolecular Assemblies
Three-Dimensional Electron Microscopy of Macromolecular Assemblies Joachim Frank Wadsworth Center for Laboratories and Research State of New York Department of Health The Governor Nelson A. Rockefeller
More informationProcessing Heterogeneity
New Challenges for Processing Heterogeneity Nikolaus Grigorieff Larson, The Far Side Heterogeneity and Biology Translocation, Brilot et al 2013 Glutamate receptor, Dürr et al 2014 Spliceosome, Wahl et
More informationPhase problem: Determining an initial phase angle α hkl for each recorded reflection. 1 ρ(x,y,z) = F hkl cos 2π (hx+ky+ lz - α hkl ) V h k l
Phase problem: Determining an initial phase angle α hkl for each recorded reflection 1 ρ(x,y,z) = F hkl cos 2π (hx+ky+ lz - α hkl ) V h k l Methods: Heavy atom methods (isomorphous replacement Hg, Pt)
More informationCopyright Mark Brandt, Ph.D A third method, cryogenic electron microscopy has seen increasing use over the past few years.
Structure Determination and Sequence Analysis The vast majority of the experimentally determined three-dimensional protein structures have been solved by one of two methods: X-ray diffraction and Nuclear
More informationCCP4 Diamond 2014 SHELXC/D/E. Andrea Thorn
CCP4 Diamond 2014 SHELXC/D/E Andrea Thorn SHELXC/D/E workflow SHELXC: α calculation, file preparation SHELXD: Marker atom search = substructure search SHELXE: density modification Maps and coordinate files
More informationLecture CIMST Winter School. 1. What can you see by TEM?
Lecture CIMST Winter School Cryo-electron microscopy and tomography of biological macromolecules 20.1.2011 9:00-9:45 in Y03G91 Dr. Takashi Ishikawa OFLB/005 Tel: 056 310 4217 e-mail: takashi.ishikawa@psi.ch
More informationThere and back again A short trip to Fourier Space. Janet Vonck 23 April 2014
There and back again A short trip to Fourier Space Janet Vonck 23 April 2014 Where can I find a Fourier Transform? Fourier Transforms are ubiquitous in structural biology: X-ray diffraction Spectroscopy
More informationStructure and Organization of Coat Proteins in the COPII Cage
Structure and Organization of Coat Proteins in the COPII Cage Stephan Fath, 1,2 Joseph D. Mancias, 1,2 Xiping Bi, 1 and Jonathan Goldberg 1, * 1 Howard Hughes Medical Institute and the Structural Biology
More informationProtein crystallography. Garry Taylor
Protein crystallography Garry Taylor X-ray Crystallography - the Basics Grow crystals Collect X-ray data Determine phases Calculate ρ-map Interpret map Refine coordinates Do the biology. Nitrogen at -180
More informationSummary of Experimental Protein Structure Determination. Key Elements
Programme 8.00-8.20 Summary of last week s lecture and quiz 8.20-9.00 Structure validation 9.00-9.15 Break 9.15-11.00 Exercise: Structure validation tutorial 11.00-11.10 Break 11.10-11.40 Summary & discussion
More informationFig. 1. Stereo images showing (A) the best fit of the atomic model for F actin and the F actin map obtained by cryo-em and image analysis, and (B) goo
Fig. 1. Stereo images showing (A) the best fit of the atomic model for F actin and the F actin map obtained by cryo-em and image analysis, and (B) good correspondence between the location of Cys374 and
More informationHandout 12 Structure refinement. Completing the structure and evaluating how good your data and model agree
Handout 1 Structure refinement Completing the structure and evaluating how good your data and model agree Why you should refine a structure We have considered how atoms are located by Patterson, direct
More informationElectron microscopy in molecular cell biology II
Electron microscopy in molecular cell biology II Cryo-EM and image processing Werner Kühlbrandt Max Planck Institute of Biophysics Sample preparation for cryo-em Preparation laboratory Specimen preparation
More informationStructure factors again
Structure factors again Remember 1D, structure factor for order h F h = F h exp[iα h ] = I 01 ρ(x)exp[2πihx]dx Where x is fractional position along unit cell distance (repeating distance, origin arbitrary)
More informationScattering by two Electrons
Scattering by two Electrons p = -r k in k in p r e 2 q k in /λ θ θ k out /λ S q = r k out p + q = r (k out - k in ) e 1 Phase difference of wave 2 with respect to wave 1: 2π λ (k out - k in ) r= 2π S r
More informationPseudo translation and Twinning
Pseudo translation and Twinning Crystal peculiarities Pseudo translation Twin Order-disorder Pseudo Translation Pseudo translation b Real space a Reciprocal space Distance between spots: 1/a, 1/b Crystallographic
More informationSUPPLEMENTARY INFORMATION
Supplementary materials Figure S1 Fusion protein of Sulfolobus solfataricus SRP54 and a signal peptide. a, Expression vector for the fusion protein. The signal peptide of yeast dipeptidyl aminopeptidase
More informationIntroduction to" Protein Structure
Introduction to" Protein Structure Function, evolution & experimental methods Thomas Blicher, Center for Biological Sequence Analysis Learning Objectives Outline the basic levels of protein structure.
More informationX-ray Crystallography I. James Fraser Macromolecluar Interactions BP204
X-ray Crystallography I James Fraser Macromolecluar Interactions BP204 Key take-aways 1. X-ray crystallography results from an ensemble of Billions and Billions of molecules in the crystal 2. Models in
More informationPHENIX Wizards and Tools
PHENIX Wizards and Tools Tom Terwilliger Los Alamos National Laboratory terwilliger@lanl.gov l The PHENIX project Computational Crystallography Initiative (LBNL) Paul Adams, Ralf Grosse-Kunstleve, Peter
More informationSchematic representation of relation between disorder and scattering
Crystal lattice Reciprocal lattice FT Schematic representation of relation between disorder and scattering ρ = Δρ + Occupational disorder Diffuse scattering Bragg scattering ρ = Δρ + Positional
More informationTutorial 1 Geometry, Topology, and Biology Patrice Koehl and Joel Hass
Tutorial 1 Geometry, Topology, and Biology Patrice Koehl and Joel Hass University of California, Davis, USA http://www.cs.ucdavis.edu/~koehl/ims2017/ Biology = Multiscale. 10 6 m 10 3 m m mm µm nm Å ps
More informationModel building and validation for cryo-em maps at low resolution
International Workshop of Advanced Image Processing of Cryo-Electron Microscopy 2015 Tsinghua University, Beijing, China June 3-7, 2015 Model building and validation for cryo-em maps at low resolution
More informationDetermination of the Substructure
Monday, June 15 th, 2009 Determination of the Substructure EMBO / MAX-INF2 Practical Course http://shelx.uni-ac.gwdg.de Overview Substructure Definition and Motivation Extracting Substructure Data from
More informationFrom electron crystallography to single particle cryoem
From electron crystallography to single particle cryoem Nobel Lectures in Chemistry 8 th December 2017 Richard Henderson From Baker & Henderson (2001) Int.Tab.Cryst.Vol.F, on-line (2006), revised (2011)
More informationImage Assessment San Diego, November 2005
Image Assessment San Diego, November 005 Pawel A. Penczek The University of Texas Houston Medical School Department of Biochemistry and Molecular Biology 6431 Fannin, MSB6.18, Houston, TX 77030, USA phone:
More informationBasics of protein structure
Today: 1. Projects a. Requirements: i. Critical review of one paper ii. At least one computational result b. Noon, Dec. 3 rd written report and oral presentation are due; submit via email to bphys101@fas.harvard.edu
More informationNear-atomic resolution using electron cryomicroscopy and single-particle reconstruction
Near-atomic resolution using electron cryomicroscopy and single-particle reconstruction Xing Zhang*, Ethan Settembre, Chen Xu, Philip R. Dormitzer, Richard Bellamy, Stephen C. Harrison **, and Nikolaus
More informationProtein Structure Determination 9/25/2007
One-dimensional NMR spectra Ethanol Cellulase (36 a.a.) Branden & Tooze, Fig. 18.16 1D and 2D NMR spectra of inhibitor K (57 a.a.) K. Wuthrich, NMR of Proteins and Nucleic Acids. (Wiley, 1986.) p. 54-55.
More informationAnomalous dispersion
Selenomethionine MAD Selenomethionine is the amino acid methionine with the Sulfur replaced by a Selenium. Selenium is a heavy atom that also has the propery of "anomalous scatter" at some wavelengths,
More informationModelling against small angle scattering data. Al Kikhney EMBL Hamburg, Germany
Modelling against small angle scattering data Al Kikhney EMBL Hamburg, Germany Validation of atomic models CRYSOL Rigid body modelling SASREF BUNCH CORAL Oligomeric mixtures OLIGOMER Flexible systems EOM
More informationMolecular Biology Course 2006 Protein Crystallography Part II
Molecular Biology Course 2006 Protein Crystallography Part II Tim Grüne University of Göttingen Dept. of Structural Chemistry December 2006 http://shelx.uni-ac.gwdg.de tg@shelx.uni-ac.gwdg.de Overview
More informationSUPPLEMENTARY INFORMATION
DOI: 10.1038/NCHEM.1290 Metal-directed, chemically tunable assembly of one-, two- and threedimensional crystalline protein arrays 1 2 1 1 1,3 Jeffrey D. Brodin 1, X. I. Ambroggio 2, Chunyan Tang 1, Kristin
More informationProtein Sorting, Intracellular Trafficking, and Vesicular Transport
Protein Sorting, Intracellular Trafficking, and Vesicular Transport Noemi Polgar, Ph.D. Department of Anatomy, Biochemistry and Physiology Email: polgar@hawaii.edu Phone: 692-1422 Outline Part 1- Trafficking
More informationWeb-based Auto-Rickshaw for validation of the X-ray experiment at the synchrotron beamline
Web-based Auto-Rickshaw for validation of the X-ray experiment at the synchrotron beamline Auto-Rickshaw http://www.embl-hamburg.de/auto-rickshaw A platform for automated crystal structure determination
More informationSymmetry Crystallography
Crystallography Motif: the fundamental part of a symmetric design that, when repeated, creates the whole pattern In 3-D, translation defines operations which move the motif into infinitely repeating patterns
More informationProtein Structure Prediction
Protein Structure Prediction Michael Feig MMTSB/CTBP 2006 Summer Workshop From Sequence to Structure SEALGDTIVKNA Ab initio Structure Prediction Protocol Amino Acid Sequence Conformational Sampling to
More informationHelpful resources for all X ray lectures Crystallization http://www.hamptonresearch.com under tech support: crystal growth 101 literature Spacegroup tables http://img.chem.ucl.ac.uk/sgp/mainmenu.htm Crystallography
More informationResolution: maximum limit of diffraction (asymmetric)
Resolution: maximum limit of diffraction (asymmetric) crystal Y X-ray source 2θ X direct beam tan 2θ = Y X d = resolution 2d sinθ = λ detector 1 Unit Cell: two vectors in plane of image c* Observe: b*
More information1) NMR is a method of chemical analysis. (Who uses NMR in this way?) 2) NMR is used as a method for medical imaging. (called MRI )
Uses of NMR: 1) NMR is a method of chemical analysis. (Who uses NMR in this way?) 2) NMR is used as a method for medical imaging. (called MRI ) 3) NMR is used as a method for determining of protein, DNA,
More informationGeneral theory of diffraction
General theory of diffraction X-rays scatter off the charge density (r), neutrons scatter off the spin density. Coherent scattering (diffraction) creates the Fourier transform of (r) from real to reciprocal
More informationLikelihood and SAD phasing in Phaser. R J Read, Department of Haematology Cambridge Institute for Medical Research
Likelihood and SAD phasing in Phaser R J Read, Department of Haematology Cambridge Institute for Medical Research Concept of likelihood Likelihood with dice 4 6 8 10 Roll a seven. Which die?? p(4)=p(6)=0
More informationSUPPLEMENTARY FIGURES. Structure of the cholera toxin secretion channel in its. closed state
SUPPLEMENTARY FIGURES Structure of the cholera toxin secretion channel in its closed state Steve L. Reichow 1,3, Konstantin V. Korotkov 1,3, Wim G. J. Hol 1$ and Tamir Gonen 1,2$ 1, Department of Biochemistry
More informationImproving cryo-em maps: focused 2D & 3D classifications and focused refinements
Improving cryo-em maps: focused 2D & 3D classifications and focused refinements 3rd International Symposium on Cryo-3D Image Analysis 23.3.2018, Tahoe Bruno Klaholz Centre for Integrative Biology, IGBMC,
More informationresearch papers AMoRe: classical and modern 2. Fast rotational sampling procedures Stefano Trapani* and Jorge Navaza
Acta Crystallographica Section D Biological Crystallography ISSN 0907-4449 AMoRe: classical and modern Stefano Trapani* and Jorge Navaza IBS, Institut de Biologie Structurale Jean-Pierre Ebel, 41 Rue Jules
More informationBiology III: Crystallographic phases
Haupt/Masterstudiengang Physik Methoden moderner Röntgenphysik II: Streuung und Abbildung SS 2013 Biology III: Crystallographic phases Thomas R. Schneider, EMBL Hamburg 25/6/2013 thomas.schneider@embl-hamburg.de
More informationTwinning in PDB and REFMAC. Garib N Murshudov Chemistry Department, University of York, UK
Twinning in PDB and REFMAC Garib N Murshudov Chemistry Department, University of York, UK Contents Crystal peculiarities Problem of twinning Occurrences of twinning in PDB Recognition of potential operators
More information13-3. Synthesis-Secretory pathway: Sort lumenal proteins, Secrete proteins, Sort membrane proteins
13-3. Synthesis-Secretory pathway: Sort lumenal proteins, Secrete proteins, Sort membrane proteins Molecular sorting: specific budding, vesicular transport, fusion 1. Why is this important? A. Form and
More informationProtein Structure Determination. Part 1 -- X-ray Crystallography
Protein Structure Determination Part 1 -- X-ray Crystallography Topics covering in this 1/2 course Crystal growth Diffraction theory Symmetry Solving phases using heavy atoms Solving phases using a model
More informationData quality indicators. Kay Diederichs
Data quality indicators Kay Diederichs Crystallography has been highly successful Now 105839 Could it be any better? 2 Confusion what do these mean? CC1/2 Rmerge Rsym Mn(I/sd) I/σ Rmeas CCanom Rpim Rcum
More informationID14-EH3. Adam Round
Bio-SAXS @ ID14-EH3 Adam Round Contents What can be obtained from Bio-SAXS Measurable parameters Modelling strategies How to collect data at Bio-SAXS Procedure Data collection tests Data Verification and
More informationCS273: Algorithms for Structure Handout # 13 and Motion in Biology Stanford University Tuesday, 11 May 2003
CS273: Algorithms for Structure Handout # 13 and Motion in Biology Stanford University Tuesday, 11 May 2003 Lecture #13: 11 May 2004 Topics: Protein Structure Determination Scribe: Minli Zhu We acknowledge
More informationSUPPLEMENTARY INFORMATION
Table of Contents Page Supplementary Table 1. Diffraction data collection statistics 2 Supplementary Table 2. Crystallographic refinement statistics 3 Supplementary Fig. 1. casic1mfc packing in the R3
More informationStructural Bioinformatics (C3210) Molecular Docking
Structural Bioinformatics (C3210) Molecular Docking Molecular Recognition, Molecular Docking Molecular recognition is the ability of biomolecules to recognize other biomolecules and selectively interact
More informationWhy do We Trust X-ray Crystallography?
Why do We Trust X-ray Crystallography? Andrew D Bond All chemists know that X-ray crystallography is the gold standard characterisation technique: an X-ray crystal structure provides definitive proof of
More informationProtein Dynamics. The space-filling structures of myoglobin and hemoglobin show that there are no pathways for O 2 to reach the heme iron.
Protein Dynamics The space-filling structures of myoglobin and hemoglobin show that there are no pathways for O 2 to reach the heme iron. Below is myoglobin hydrated with 350 water molecules. Only a small
More informationSupplementary Information
SSZ-52, a zeolite with an 18-layer aluminosilicate framework structure related to that of the DeNOx catalyst Cu-SSZ-13 Dan Xie 1,2, Lynne B. McCusker 2 *, Christian Baerlocher 2, Stacey I. Zones 1 *, Wei
More informationSelective total encapsulation of the sulfate anion by neutral nano-jars
Supporting Information for Selective total encapsulation of the sulfate anion by neutral nano-jars Isurika R. Fernando, Stuart A. Surmann, Alexander A. Urech, Alexander M. Poulsen and Gellert Mezei* Department
More informationNMR of large protein systems: Solid state and dynamic nuclear polarization. Sascha Lange, Leibniz-Institut für Molekulare Pharmakologie (FMP)
NMR of large protein systems: Solid state and dynamic nuclear polarization Sascha Lange, Leibniz-Institut für Molekulare Pharmakologie (FMP) The Aim of the Game solution NMR other methods solid state NMR
More informationPSD '17 -- Xray Lecture 5, 6. Patterson Space, Molecular Replacement and Heavy Atom Isomorphous Replacement
PSD '17 -- Xray Lecture 5, 6 Patterson Space, Molecular Replacement and Heavy Atom Isomorphous Replacement The Phase Problem We can t measure the phases! X-ray detectors (film, photomultiplier tubes, CCDs,
More informationCopyright WILEY-VCH Verlag GmbH, D Weinheim, 2000 Angew. Chem Supporting Information For Binding Cesium Ion with Nucleoside Pentamers.
Copyright WILEY-VCH Verlag GmbH, D-69451 Weinheim, 2000 Angew. Chem. 2000 Supporting Information For Binding Cesium Ion with Nucleoside Pentamers. Templated Self-Assembly of an Isoguanosine Decamer.**
More informationPart 1 X-ray Crystallography
Part 1 X-ray Crystallography What happens to electron when it is hit by x-rays? 1. The electron starts vibrating with the same frequency as the x-ray beam 2. As a result, secondary beams will be scattered
More informationX- ray crystallography. CS/CME/Biophys/BMI 279 Nov. 12, 2015 Ron Dror
X- ray crystallography CS/CME/Biophys/BMI 279 Nov. 12, 2015 Ron Dror 1 Outline Overview of x-ray crystallography Crystals Electron density Diffraction patterns The computational problem: determining structure
More informationSupplemental Figure and Movie Legends Figure S1. Time course experiments on the thermal stability of apo AT cpn-α by native PAGE (related to Figure 2B). The samples were heated, respectively, to (A) 45
More informationRIGID BODY REFINEMENT OF WATER MEDIATED TRIPLE HELICAL STRUCTURE OF β-d-1,3 XYLAN FROM PALMARIA PALMATA (L.) KUNTZE, RHODOPHYTA)
Pak. J. Bot., 36(4): 745-750, 2004. RIGID BODY REFINEMENT OF WATER MEDIATED TRIPLE HELICAL STRUCTURE OF β-d-1,3 XYLAN FROM PALMARIA PALMATA (L.) KUNTZE, RHODOPHYTA) NAHEED AKHTAR, SADAF NAEEM, WASEEM AHMED
More informationFast, Intuitive Structure Determination IV: Space Group Determination and Structure Solution
Fast, Intuitive Structure Determination IV: Space Group Determination and Structure Solution November 25, 2013 Welcome I I Dr. Michael Ruf Product Manager Crystallography Bruker AXS Inc. Madison, WI, USA
More informationA New Approach to EM of Helical Polymers Yields New Insights
A New Approach to EM of Helical Polymers Yields New Insights Helical polymers are ubiquitous in biology Actin,, microtubules, intermediate filaments, thick filaments, viruses, bacteriophage,, flagella,
More informationElectronic Supplementary Information (ESI) for Chem. Commun. Unveiling the three- dimensional structure of the green pigment of nitrite- cured meat
Electronic Supplementary Information (ESI) for Chem. Commun. Unveiling the three- dimensional structure of the green pigment of nitrite- cured meat Jun Yi* and George B. Richter- Addo* Department of Chemistry
More informationMeasurement of Dynamic trna Movement and Visualizing Ribosome Biogenesis Applications of Time resolved Electron Cryo microscopy
2011 TIGP CBMB Seminar Measurement of Dynamic trna Movement and Visualizing Ribosome Biogenesis Applications of Time resolved Electron Cryo microscopy Ribosome dynamics and trna movement by time resolved
More informationSUPPLEMENTARY INFORMATION
Supplementary Table 1: Data collection, phasing and refinement statistics ChbC/Ta 6 Br 12 Native ChbC Data collection Space group P4 3 2 1 2 P4 3 2 1 2 Cell dimensions a, c (Å) 132.75, 453.57 132.81, 452.95
More informationStructurale, Université Grenoble Alpes, CNRS, CEA, Grenoble, France
Supplementary Information to Lysine relay mechanism coordinates intermediate transfer in vitamin B6 biosynthesis Matthew J. Rodrigues 1,2, Volker Windeisen 1,3, Yang Zhang 4, Gabriela Guédez 3, Stefan
More informationMacromolecular Crystallography Part II
Molecular Biology Course 2009 Macromolecular Crystallography Part II Tim Grüne University of Göttingen Dept. of Structural Chemistry November 2009 http://shelx.uni-ac.gwdg.de tg@shelx.uni-ac.gwdg.de From
More informationTLS and all that. Ethan A Merritt. CCP4 Summer School 2011 (Argonne, IL) Abstract
TLS and all that Ethan A Merritt CCP4 Summer School 2011 (Argonne, IL) Abstract We can never know the position of every atom in a crystal structure perfectly. Each atom has an associated positional uncertainty.
More informationFondamenti di Chimica Farmaceutica. Computer Chemistry in Drug Research: Introduction
Fondamenti di Chimica Farmaceutica Computer Chemistry in Drug Research: Introduction Introduction Introduction Introduction Computer Chemistry in Drug Design Drug Discovery: Target identification Lead
More informationCRYSTALLOGRAPHY AND STORYTELLING WITH DATA. President, Association of Women in Science, Bethesda Chapter STEM Consultant
CRYSTALLOGRAPHY AND STORYTELLING WITH DATA President, Association of Women in Science, Bethesda Chapter STEM Consultant MY STORY Passion for Science BS Biology Major MS Biotechnology & Project in Bioinformatics
More informationDetermining Protein Structure BIBC 100
Determining Protein Structure BIBC 100 Determining Protein Structure X-Ray Diffraction Interactions of x-rays with electrons in molecules in a crystal NMR- Nuclear Magnetic Resonance Interactions of magnetic
More informationProtein Crystallography Part II
Molecular Biology Course 2007 Protein Crystallography Part II Tim Grüne University of Göttingen Dept. of Structural Chemistry November 2007 http://shelx.uni-ac.gwdg.de tg@shelx.uni-ac.gwdg.de Overview
More informationComputational Modeling of Protein Dynamics. Yinghao Wu Department of Systems and Computational Biology Albert Einstein College of Medicine Fall 2014
Computational Modeling of Protein Dynamics Yinghao Wu Department of Systems and Computational Biology Albert Einstein College of Medicine Fall 2014 Outline Background of protein dynamics Basic computational
More informationWhat can electron microscopy tell us about chaperoned protein folding? Helen R Saibil
Review R45 What can electron microscopy tell us about chaperoned protein folding? Helen R Saibil Chaperonins form large, cage-like structures that act as protein folding machines. Recent developments in
More information